About this item
CAS Number: 7789-00-6
Formula Weight: 194.21
Formula: K2CrO4
Hazard Info: Toxic
Density (g/mL): 2.732
Freezing Point (°C): 975
Solubility: Water
Synonyms: Dipotassium Chromate, Neutral Potassium chromate
Shelf Life (months): 36
Storage: Blue
Note: The chemical specifications for some items on this product page may differ from the specifications listed above. For more information, consult the Safety Data Sheet or contact your Ward's representative.
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Specifications
- Disposal Method:This disposal method is published for your convenience. You MUST have checked with your federal, state, and local regulations before using this method and these methods are only applicable for small laboratory sized quantities.
Use a lab apron, chemical resistant gloves and goggles before following the below method to dispose of hazardous waste.
1. Add the substance to a twofold excess of 4% sodium thiosulfate (Na2S2O3) solution. Stir. Place the solution in a fume hood.
2. Let the reaction come to completion over the course of an hour.
3. Neutralize the solution with either dilute sodium hydroxide or dilute sulfuric acid to about a pH of 7 if necessary.
4. The residue in the mixture should be filtered and removed for disposal by a licensed hazardous waste disposal service. - Solution Preparation:To prepare a solution, determine the formula weight of the material, the concentration (Molarity) of the solution, and the amount of solution desired in Liters. Once this information has been obtained, use the following formula:
(Formula Weight) x (Concentration) x (Desired Volume) = Number of grams in desired volume of liquid
For a 1 M, 1 L solution:
(Formula Weight) x (1 mol/L) x (1 L) = x g added to 1-L volumetric flask. Dilute to a final volume of 1 L with DI Water.